506 DISEASES OF SWINE 



The final report on this herd showed a much better outcome 

 than might have been expected. Of the 29 shoats treated, only 3 

 died, and of the 3 old hogs treated, none were lost. Five of the 13 

 shoats left as checks died. This was a very pleasing result, and 

 shows again that even hogs that are sick with cholera at the time 

 of treatment can often be saved if a good-sized dose of serum be 

 given. It would be very interesting, indeed, to have the tempera- 

 tures of these animals as a guide to just how many of the injected 

 shoats were coming down with cholera on the date treatment was 

 given. With the use of somewhat larger amounts of serum in the 

 shoats, I am of the opinion that even a better result might have 

 been shown. The amount injected in the old sows is nearer to 

 the dose which should be used where cholera already exists, as 

 shown by a high temperature and visible symptoms of the 



Herd Number Forty-six. — The farm on which this herd was 

 located was in the same neighborhood as Herd Number Forty. 

 The disease, however, did not spread to this farm until the latter 

 part of December. At the time when the government veterina- 

 rians were called several of the hogs had already died and a large 

 percentage of those remaining were taken sick. One of the very 

 sick animals was killed and the body opened for postmortem ex- 

 amination. The enlarged spleen, spotted kidneys, enlarged Kver, 

 swollen and discolored lymph-glands, and other changes typical of 

 cholera left no doubt as to the correct diagnosis of the disease. 

 This herd had been following a bunch of feeding cattle and were 

 in excellent condition when the disease struck them. 



In the same yard with the sick hogs there were 55 shoats which 

 were all exposed to the disease, and many of them, no doubt, al- 

 ready coming down with the disease. As no temperatures are 

 recorded, it is impossible to say just what percentage were develop- 

 ing cholera. These shoats were injected with the serum alone, each 

 animal receiving 40 c.c. 



Fifteen shoats of larger size, averaging about 250 pounds, were 

 being fattened in a separate lot, which immediately adjoined the 

 cattle lot in which the sick hogs were running. These large shoats 

 were injected with 30 to 50 c.c. of serum each. Four old hogs were 

 also injected with 50-c.c. doses of serum. Ten shoats of the smaller 



